There's a conversation that happens in almost every household with a new electric car: "I never got car sick in the old car. What's different?" It's a fair question, and it's not your imagination. Some studies suggest motion sickness is noticeably more common in electric cars than in petrol ones.
The reasons aren't mysterious, and they aren't flaws. They're side effects of how electric cars are engineered — four specific design characteristics that affect passengers' inner ears, and they apply across electric car models regardless of brand.
Here's what's actually going on.
1. Instant torque: acceleration faster than your senses can predict
A petrol engine builds power in stages — ignition, revs climbing, gears engaging — so speed changes arrive with a small, predictable delay. Your brain and inner ear use that delay to prepare for what's coming.
An electric motor is different. It delivers near-full torque almost instantly, responding many times faster than an engine can. Even a light press on the pedal produces a firm, immediate shove.
In city traffic, that means repeated bursts of acceleration with no warning — especially in sport mode, where torque delivery is at its most aggressive. Your body moves before your brain has time to anticipate it. And that mismatch between what your body feels and what your senses expected is the basic mechanism of motion sickness.
2. Invisible regenerative braking: deceleration you can't see or hear
This is the factor that surprises most people — because it's invisible.
In a petrol car, lift your foot off the accelerator and the car coasts, or slows gradually under engine drag. The deceleration is gradual enough that your body anticipates it. In an EV, lifting off the pedal switches the motor into generator mode. The car's momentum becomes electricity, creating a braking force you can't see, can't hear and often can't predict.
There's usually no brake light to signal the slowdown — and your passenger's inner ear gets no warning at all. In stop-start traffic, an EV can perform dozens of these silent decelerations in a single trip. On aggressive settings, including one-pedal driving, the effect is stronger — and for sensitive passengers it's the single biggest source of queasiness.
3. The silent cabin: when quiet removes an audio cue
Your brain uses sound as a speed reference. Engine noise rising and falling tells you the car is accelerating or slowing down — before you feel it. In a near-silent EV cabin, that reference disappears.
The result is a sensory conflict: your eyes see the road moving, your ears report nothing, and your inner ear struggles to reconcile the two. It's the same reason people feel uneasy in very quiet rooms or on silent elevators — the brain expects feedback that isn't there.
Some EVs now offer simulated engine sound precisely to restore those audio cues. It's not about pretending the car has an engine. It's about giving passengers' brains the information they need to stay balanced.
4. Weight, suspension and the rear seat
A battery pack makes an electric car noticeably heavier than a comparable petrol car — commonly several hundred kilograms more. That weight has to be managed by the suspension, and how it's tuned changes what passengers feel.
A soft suspension allows the body to pitch and dive under braking and acceleration. A firm one transmits every small bump into the cabin. And poorly managed weight creates a low-frequency rocking motion — the kind of movement that reliably triggers nausea.
Rear-seat passengers feel it most — whether it's an electric SUV or a sedan, they sit closer to the rear wheels, where the movement is greatest. They have a more restricted view of the road ahead — and they feel every pitch, roll and rock in full. If you've ever wondered why the back seat feels worse than the front in an EV — that's why.
5. Why some people are more sensitive than others
Motion sickness isn't a level playing field. Children are more prone to it than adults — their inner ears are still developing, and their sense of balance is easily overwhelmed. Older passengers can be more sensitive too, as can anyone tired, reading, or using a phone while travelling.
Two passengers can sit in the same family electric car on the same road and have completely different experiences. That's normal. It doesn't mean the car is "bad" — it means each passenger's senses process the same motion differently.
Conclusion
Electric cars make some people queasy for four engineering reasons: instant torque, invisible regenerative braking, a silent cabin and weight that demands careful suspension tuning. None of these is a flaw in electric driving — they're the side effects of electric car technology that's genuinely new.
And all four are things that can be managed — by drivers, by passengers, and increasingly by the cars themselves. The solutions are practical, and they're getting better with every software update and every new model — good news for anyone driving electric cars in Australia.
This is the first of two parts. [Part 2: Car Sick in an EV? Practical fixes for Passengers and Drivers] — coming next.
